Rainier is pleased to announce the award of the I-405 Renton to Bellevue Corridor Widening and Express Toll Lanes project.

Rainier Welding is an award-winning, full service, AISC-Certified fabricator of steel and aluminum.

Rainier has built a reputation as one of the leading fabricators on the West Coast for marine, bridge, transportation and commercial applications.  We pride ourselves on consistently delivering high-quality to our customers on schedule, while investing in and providing opportunity for our outstanding people, who are the backbone of our organization.  Located in Redmond, WA, we have a 35,000 square-foot fabrication facility capable of handling the largest, most complex projects.


AISC Certification sets a standard for the steel industry. Companies that are AISC Certified have been through a rigorous initial evaluation, and are subject to yearly reviews. An independent auditing company confirms that companies have the personnel, knowledge, organization, equipment, experience, capability, procedures, and commitment to produce the required quality of work for a given category, such as our fabricating plant.